Characterization of photo-neutrons produced by 150 MeV and 1 GeV electrons impinging on high Z-metallic targets for neutron resonance spectroscopy | ||||
| Arab Journal of Nuclear Sciences and Applications | ||||
| Article 20, Volume 52, Issue 2, April 2019, Page 162-168 PDF (495.04 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ajnsa.2019.3755.1088 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Fatma Mohamed Ragab  1; ElTayeb Elsaady2; Hosnia Abuzeid3; Afaf Nada3; Mustafa ElAshmawy2
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| 1Faculty of Women, Ain Shams UNI | ||||
| 2Uni | ||||
| 3UNi | ||||
| Abstract | ||||
| Monte Carlo calculations have been performed using MCNP code to study the generation, angular distribution and energy spectrum of photo-neutrons for 1 GeV and 150 MeV electron beam energies impinging on different thickness of Tungsten, Tantalum and Lead targets. It is noticed that the photo-neutron yield increases as the target thickness increases then saturates beyond an optimized thickness of the target. Moreover, the photo-neutron yield shows significant increase as the electron energy increases. At the optimized thickness, the angular distribution of photo-neutrons is found almost isotropic for 150 MeV electrons and anisotropic for 1 GeV electrons. Further, by increasing the electron energy and/or the target thickness the angular distribution is found to be forward peaked. The energy spectrum of photo-neutrons can be well described by a Maxwellian distribution for both electron energies. Such calculations can help in developing a photo-neutron source based time of flight facility (TOF) for elemental and isotopic identification via neutron resonance spectroscopy. Photo-neutron yields, angular distribution, mean energy, energy spectrum and nuclear temperature for 1 GeV and 150 MeV electron energies and different target materials are presented. | ||||
| Keywords | ||||
| photo-neutron; angular distribution; Monte Carlo calculations; electron accelerator | ||||
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